Physics of Waveguiding

**Chapter 9**

**Abstract**

**1. Introduction**

**145**

Radiation Fluxes

Formation Study

*Egorov Evgenii Vladimirovich and*

*Egorov Vladimir Konstantinovich*

Waveguide-Resonance

of X-Ray Nanosize Beam

Phenomenon Discovered in Result

The work discussed shortly the experimental results, which was the

**Keywords:** X-ray flux, external total reflection, X-ray standing wave, coherence length, X-ray nanophotonics, planar X-ray waveguide resonator,

The problem of X-ray beam formation with a minimal size cross section and a small angular divergence is the central problem of all X-ray diagnostical methods. The first real step for the solution of this problem was connected with the names of P. Hirsch and J. Keller suggested to form X-ray microbeams by employing the glass capillary [1]. More recently, the planar thin film waveguides have been offered for X-ray microbeam formation [2]. Authors of the work showed that the waveguide with a material media core for X-ray beam transportation can form small size beams, but the beam intensity attenuation was very great. In the direction, development similar investigations were carried out in a number of experimental works

waveguide-resonance propagation phenomenon, spatial coherence,

angular divergence, partial angular tunneling effect

waveguide-resonance mechanism relevation forerunner of characteristic X-ray radiation flux propagation. Technology of the planar air extended slit clearance preparation is presented. The methodology of X-ray beam parameter study formed by these slit clearances, which allowed to find the critical parameter answering for the radiation flux propagation mechanism change from the multiple external total reflections to the waveguide-resonance one, is described. Main features of the X-ray flux waveguideresonance propagation mechanism were revealed. The self-consistent model of the mechanism is displayed with details. It is shown that the waveguide-resonance effect has universal character, and it reflects the fundamental nature phenomenon. The peculiarities of X-ray device functioned in frame of the phenomenon manifestation planar X-ray waveguide resonator (PXWR) and the increasing methods of its practical efficiency are discussed. The phenomenon practical application is presented concisely.
